[imgur] Improve (Closes #7928)

youtube_dl/extractor/imgur.py

@@ -13,7 +13,7 @@ from ..utils import (
 
 
 class ImgurIE(InfoExtractor):
-    _VALID_URL = r'https?://(?:i\.)?imgur\.com/(gallery/)?(?P<id>[a-zA-Z0-9]{6,})'
+    _VALID_URL = r'https?://(?:i\.)?imgur\.com/(?:(?:gallery|topic/[^/]+)/)?(?P<id>[a-zA-Z0-9]{6,})(?:[/?#&]+|\.[a-z]+)?$'
 
     _TESTS = [{
         'url': 'https://i.imgur.com/A61SaA1.gifv',
@@ -40,6 +40,9 @@ class ImgurIE(InfoExtractor):
             'description': 'Imgur: The most awesome images on the Internet.'
 
         }
+    }, {
+        'url': 'http://imgur.com/topic/Funny/N8rOudd',
+        'only_matching': True,
     }]
 
     def _real_extract(self, url):
@@ -109,28 +112,38 @@ class ImgurIE(InfoExtractor):
 
 
 class ImgurAlbumIE(InfoExtractor):
-    _VALID_URL = r'https?://(?:i\.)?imgur\.com/(gallery/)?(?P<id>[a-zA-Z0-9]{5})(?![a-zA-Z0-9])'
+    _VALID_URL = r'https?://(?:i\.)?imgur\.com/(?:(?:a|gallery|topic/[^/]+)/)?(?P<id>[a-zA-Z0-9]{5})(?:[/?#&]+)?$'
 
-    _TEST = {
+    _TESTS = [{
         'url': 'http://imgur.com/gallery/Q95ko',
         'info_dict': {
             'id': 'Q95ko',
         },
         'playlist_count': 25,
-    }
+    }, {
+        'url': 'http://imgur.com/a/j6Orj',
+        'only_matching': True,
+    }, {
+        'url': 'http://imgur.com/topic/Aww/ll5Vk',
+        'only_matching': True,
+    }]
 
     def _real_extract(self, url):
         album_id = self._match_id(url)
 
-        album_img_data = self._download_json(
-            'http://imgur.com/gallery/%s/album_images/hit.json?all=true' % album_id, album_id)['data']
+        album_images = self._download_json(
+            'http://imgur.com/gallery/%s/album_images/hit.json?all=true' % album_id,
+            album_id, fatal=False)
 
-        if len(album_img_data) == 0:
-            return self.url_result('http://imgur.com/%s' % album_id)
-        else:
-            album_images = album_img_data['images']
+        if album_images:
+            data = album_images.get('data')
+            if data and isinstance(data, dict):
+                images = data.get('images')
+                if images and isinstance(images, list):
                     entries = [
                         self.url_result('http://imgur.com/%s' % image['hash'])
-                for image in album_images if image.get('hash')]
-
+                        for image in images if image.get('hash')]
                     return self.playlist_result(entries, album_id)
+
+        # Fallback to single video
+        return self.url_result('http://imgur.com/%s' % album_id, ImgurIE.ie_key())